Originally Posted by cascade168
Are you saying you already have a 7spd barcon? Or, do you just want to index 7 speeds but can't find an indexed 7spd barcon? See my next comment for a 7spd indexed barcon solution.
The 8spd barcons work just fine with a seven speed cassette. I have an old 126mm rear hub bike set up exactly like this. It's a great setup and very solid. Just make sure your "Low" limit stop is set properly on the RD and that will pretty much eliminate the shifter getting to the eighth position.
If you check this page:
http://sheldonbrown.com/harris/shifters.html
Sheldon has a comment on this in this section:
"Shimano Ultegra 8 Speed Bar-end Shifters"
I don't have a set of 7 speed barcons now. I was wondering if you could alter the very common 8,9 or 10 speed versions to accept 7 speed. I know friction is an option but I'd rather have indexing if possible. Being a Campy user I am unfamiliar with the Shimano spacing system for their cassettes. Thanks for the info on the 8 speed systems.
Tim